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Experiments on the 852 nm D2 Line of 133Cs with a Diode Laser System and their use in Measurement of the Permanent Electric Dipole Moment of the Electron

Electronic Theses of Indian Institute of Science

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Title Experiments on the 852 nm D2 Line of 133Cs with a Diode Laser System and their use in Measurement of the Permanent Electric Dipole Moment of the Electron
 
Creator Ravi, Harish
 
Subject Electric Dipole Moment
Chopped Nonlinear Magnetic-Optic Rotation
Electric Dipole Moment (EDM)
Hanle Measurement
EDM Measurement
Number Density
Density-Matrix Code
Nonlinear Magneto-optic Rotation (NMOR)
Faraday Effect
Clausius-Clapeyron Equation
Physics
 
Description We give a brief introduction to atomic physics and the motivation behind our experiments in the first chapter. The electron’s electric dipole moment is an interesting quantity which is yet to be measured. In the 3rd Chapter, we use the technique of chopped non-linear magneto-optic rotation (NMOR) in a room temperature Cs vapor cell to measure the permanent electric dipole moment (EDM) in the atom. The cell has paraffin coating on the walls to increase the relaxation time. The signature of the EDM is a shift in the Larmor precession frequency correlated with the application of an E field. We analyze errors in the technique, and show that the main source of systematic error is the appearance of a longitudinal magnetic field when an electric field is applied. This error can be eliminated by doing measurements on the two ground hyperfine levels. Using an E field of 2.6 kV/cm, we place an upper limit on the electron EDM of 2.9 × 10−22 e-cm with 95% confidence. This limit can be increased by 7 orders-of-magnitude—and brought below the current best experimental value. We give future directions for how this may be achieved. In chapter 4, we examine the Hanle effect for linear and circularly polarized light for different ground states and we find opposite behavior in the transmission signal. In one case, it shifts from enhanced transmission to enhanced absorption and vice-versa in the other case. In Chapter 5, we study the transmission spectrum at different temperatures and device a way to find the number density. We then verify the Clausius-Clapeyron equation and also find the latent heat of vaporization of Cs. Finally, we wrap up with conclusions and future directions.
 
Contributor Natarajan, Vasanth
 
Date 2018-07-14T05:44:08Z
2018-07-14T05:44:08Z
2018-07-14
2016
 
Type Thesis
 
Identifier http://etd.iisc.ernet.in/2005/3817
http://etd.iisc.ernet.in/abstracts/4688/G28456-Abs.pdf
 
Language en_US
 
Relation G28456